Paperboard-cutting machine



April 17, 192s. 1,666,687

C. E. COLGROVE PAPER BOARD CUTTING MACHINE FIG z INVENTOR;

C@ BY wm April 17, 1928. 1,666,687 y c. E. czoLGRovEl PAPER BOARD CUTTING MA'CHINE Filed Jan. 1o. 192.7` s sheets-sheet 2 lNvEN-roR April 17, 192s.

C. E. COLGROVE PAPER BOARD CUTTING MACHINE Filed Jan. l0. 1927 Flc-L5 3 Sheets-Sheet lg @o 582 Xx Yy r j @Si FIGJO Hv NTOR. 6.5%

Patented Apr. 17, 1928.

UNITED STATES PATENT OFFICE.

PAPERBOARD`CUTTING MACHINE.

Application led January 10, 1927. Serial No. 160,176.

This invention relates to a paper board cutting machine as described in the present specification and illustrated in the accom-4 panying drawings which form part of the same.

yThe invention consists essentially of Vthe novel features pointed out broadly and speciically in the claims for novelty following an explanation in detail of an acceptable form of the invention.

The objects of the invention are to build a paper board cutting machine wherein the knives while cutting, travel with the board; to prevent buckling of the board while being cut; to so design the upper knife-operating mechanism, that the speed of the knives will be slightly increased immediately following their engagement with the paper stock; to have'means of easily setting the machine for the different lengths of cut required; and generally, to manufacture an eficient and lmproved paper board cutting machine capable of accomplishing the aforesaid objects.

In the drawings, Figure 1 is a side elevation view;

Figure 2 is a plan view; 1

Figure 3 is a sectional view taken on line 3-3 in Figure 2, showing ,parts broken away;

Fi ure 4 is a sectional view taken on line 4-4 1n Figure 2;

Figure 5 is a fragmentary plan view;

Figure 6 is a part elevation and part section view of the shaft 74, sleeve 72, etc.

Figure 7 is a perspective view of the cam; Figure 8 is a perspective view of the lever 27;

Figure 9 is a fragmentary perspective view; s

Figure 10 is a section view of the gear 11.

Like numerals of reference indicate corresponding parts in the various figures.

Referrin to the drawings, 10 are two spaced upright standards forming with the standards 10A, the base or frame of the machine.

11 is a horizontally-arranged bevel gear rotating in the bearing 12 carried by the two transverse channels 13; the channels are secured at their ends to the standards 10. 14 is a shaft suitably journalled in one of the standards 10 and rigidl mounting the bevel gear 16 meshingv wit the gear 11.

The gear 11 is therefore actuated by the rotation of the shaft 14.

18 is a table or carriage formed of the cross members 17 and 19, and of the. longitudinal members 20 sliding in the grooves or trackways 21 formed in both ofthe standards 10. Pivotally secured to the rear part of the table 18, is a 'U-shaped frame 23 carrying the knife 24 positioned to co-act with the corresponding knife 25 carried by the front end of the table 18. 27 are levers pivotally mounted to the front end of said table and each having a roller 28 riding in a groove or track 29 formed in the inner face of said standards 10; 30 is a link pivotally mounted between each side member of the U-frame 23 and each of the levers 27. The grooves 29 are deepened or enlarged as at 28, to present substantially an inverted isoceles triangle within which is pivotally mounted a substantially triangularly-formed cam 31 having the crank end 131A; the cam -is normally held in the position shown in Figure 4 by means of the tensioned spring 32. It will be seen that as the table 18 moves from rear to front (left to right in Figure 1), the rollers 28 will engage the edge 33 of the cams, cause the levers 27 and the U-frame to be swung downwardly, and

therefore bring the knives into co-action; as the rollers ride upon the edge 34 of the cams, these will be rotated to the position shown in Figure 9; when the table has moved suiiiciently to cause the rollers to clear the cams, the tensioned springs 32 will tilt or rotate the cams back to the position shown in Figure 4; as the table moves from front to rear (right to left in Figure 1), the rollers will engage and ride over the edge 37 of the cams, the table travelling back to` the position shown in Figures 1 and 4 without actuating the knife 24 downwardly.

The cams 31 are preferably so located or the effective length of the levers 27 made such, that when the knife 24 engages the paper stock, the pin 36A will be slightly 1n advance of a line drawn at right angles to the longitudinal axis of the machine and passing through 'the centre of the gear 11.

35 is a block sliding between the cross members 19 of' the table 18, and 36 is asecond block pivoting on the pin 36A and slid.- ing in the slide bearings 42 which are rigidly carried by the gear 11. 38 is a bearlng rigidly mounted on the upper face of the mounting the shaft 39 which is threaded to ,threadingly engage the block 36; 41 is a bevel gear rigidly carried by the shaft 39. By rotating the gear 41, the shaft 39 is rotated, shifting the block 36 in the axis of said shaft and therefore shifting the block 35 in the axis of the bars 19.

43 is the drive shaft, suitably journalled in the standards 10A, and mounting the drive'pulley 44. As the drive shaft is driven at constant speed and the length of the cut depends upon the speed of the bevel gear 11, suitable means of varying the speed of the shaft 14 must be provided; accordingly, I use a well known speed cone mechanlsm having the usual cones 45 and pivoted levers 46, and belt 47.

48 are-two blocks pivotally carried'by the levers 46 and threaded to receive the threaded spindle 49 which rotates in the standards 10, the spindle being threaded with righthand and left-'hand threads; 51 `are two gears rigid with the sleeve 52 which is slidably and non-rotatably mounted on the spindle 49; 57 is a gear rigidly mounted on the shaft 58 rotating in the bearing 60 and formed to engage with either of the gears 51 ;A 59 is a bevel gear rigidly carried by the shaft 58 and meshing with the gear 61 rig"- idly carried by the shaft 14; the gear 57 is therefore rotated from the rotation ofthe shaft 14, and the spindle 49 can be rot-ated to shift the levers 46 toward or away from one another and therefore varylthe speed of the belt 47.

To one end of the spindle 49 is rigidly `mounted a bevel gear 62 meshing with the -bevel gear 63 which is rigidly carried by the spindle 64;the spindle rotates in a suitable bearing 65 and has one end threaded to engage the threaded block 66; the block carries a stud slidably enga-ging the slotted hand .67 pivotally mounted on the front face of the graduated dial plate 68. As the shaft 49 rotates, therefore, the gears 62 and 63 i and spindle 64 are rotated, the block 66 yno shifted, and the hand 67 operated.

69 is a vertically-arranged rotatable shaft rigidly mounting at the top the bevel gear 70 meshing with the gear 41. and rigidly mounting at the bottom the bevel gear 71; 74 is a horizontally-arranged shaft rotating in the bearings 75 carried by the underside of the channels 13; the shaft rigidly carries the sprocket wheel 76 and slidably and nonrotatably carries the bevel gear 77 formed to engage with the gear71; 72 is a sleeve Slidably and rotatably carried by the shaft 74 and havingthe bevel gear 73 formed to engage with the gear 71; 81 is a sprocket wheel rigidly carried by the sleeve 72. It will be seen that the shaft 74 and sleeve 72 caigt lie rotated independently of one anot er.

versa; similarly, Ithe sleeve 52 is -so posltioned uponv the spindle 49 that only one of the gears 51 is in engagement at one time with the gear 57. l 4

85Y and 86 are sprocket wheels rigidly carried by the spindle 49, and 87 and 88 are sprocket chains operatively connecting the sprockets 85 and 86 to the sprockets 76 and 481, respectively.

The rod 82 is pivotally connected at one end to the control lever 89 which is provided with a suitable clamping mechanism 95, wherebyl the lever is releasably locked in three positions; one extreme position deteri minin that at which the engagement of the gears 3 and one of the gears 51 is effected with the gears 71 and 57, respectively; the other extreme position determining that at which the engagement of the gear 77 and the other of the. ears 51 is effected with the gears 71 and 5 respectively; and the intermediate or neutral position determining that at which t-he gears 71 and 57 are free of their co-acting gears.

Therefore, when the control lever is in its neutral position, the spindle 49 does not rotate; when the lever is in one of its eX- treme posit-ions, the spindle is rotated 'to either increase or decrease the speed of the belt 47; if the speed of the belt is increased, the number of revolutions per minute of the gear 11 is increased, the number of cuts per minute correspondingly increased, and since the paper stock is fed atconstant speed, the length of cut is decreased; similarly, if the speed of the belt is decreased, the number of cuts per minute is Vdecreased and the length of cut correspondingly increased.

In order to prevent buckling or pulling, the speed of the knives when cutting must be made substantially equal to that of the stock; and if the table is to travel faster than the stock immediately after being engaged by the knives, the longitudinal component of the lineal velocity of the pin 36A must be equal to the Speed of the stock at the instant the knives engage the stock. Since the speed of the knives is equal to the longitudinal component of the lineal speed of the pin 36A and its speed varies directly with its distance from the centre of the gear 11, it follows that as the speed of the gear 11 is decreased, the distance of the pin 36A from the centre of said gear must be proportionately increased; and similarly; as the speed of said gear is increased the distance between said pin and the centre of said gear must be ioV proportionately decreased. Therefore, the i ratio of the various co-acting gears co-ordinating the shifting of the pin 36A with the rotation of the spindle 49 must be such that the longitudinal component of the lineal velocity of the pin 36A is approximately equal to the velocity of the paper at cutting time.

As the shifting of the block 36 and pin 36A is effected bythe rotation of the shaft 39 `and gear 41 and the gear 41 is mounted on the rotating gear 11, 1t follows that the gear 4l must be rotated faster in one direction than 0pemtz'0n.-The drive shaft, which rotates at constant speed, feeds the stock uniformly through or between the rollers 90. The control lever is actuated forwardly or rearwardly to cause the spindle 49 to be rotated one way or the other, and the lever held or clamped until the hand 67 travels to indicate the length of cut desired, after which it is brought to neutral position.

As the gear 11 rotates, the block 35 is carried therewith while sliding back and forth between the bars 19, the table 18 travelling back and forth in the grooves 21. As the table travels, the rollers ride in the grooves 29 'as the rollers engage the cams 31, the U-frame is swung or oscillated downwardly and upwardly according as to whether the rollers engage the edge 33 or 34 of said cams; when the rollers engage the edge 37 of said cams, the frame remains in a substantially fixed plane.

VWhat I claim is: I

1. In a paper Stock cutting machine, a reciprocating table carrying a knife therewith, an oscillating member carried by said table and having a knife positioned to co-act with said first-mentioned knife, means for feeding the paper stock between said knives, and means adapted for oscillating said member from said table in its movement.

2. In a paper stock cutting machine, a reciprocating table carrying a knife therewith, an oscillating member carried by said table and having a knife positioned to co-act with said first-mentioned knife when said member is swung downwardly, means for feeding the paper stock between said knives, and a cam mechanism adapted for oscillat` ing said member from said table in its movement.

3. In a paper stock cutting machine, a frame, a drive shaft, a reciprocating table carrying a knife therewith, an oscillating member carried by said table and having a knife positioned to co-act with said irstmentioned knife, means for feeding the paper stock between said knives at constant speed, a gear rotatably mounted under said table, means operatively connected between said gear and table for actuating same from the rotation of said gear, means for actuating said gear from the rotation of said drive shaft, and means for varying the Speed of said gear.

4. In a paper stock cuttinomachine, a reciprocating table carrying a lknife therewith, an oscillating member carried by said table and having a knife positioned to co-act with said first-mentioned knife, means for feeding the paper stock between said knifes at constant speed, means for varying the number of strokes per minute of said table, and indicating means operatively connected with said last-mentioned means for determining the length of cut required.

5. In a paper stock--cutting machine, a reciprocating table. carryinga knife therewith,

an oscillating member carried by said table and having a knife positioned to co-act with said first-mentioned knife, means for feeding the paper stock between said knives at constant speed, means for varying the number of strokes per minute of said table, and means operatively connected with said lastmentioned means adapted for automatically adjusting the speed of said table when the knives are cutting to the speed of the stock.

6. In a paper stock cutting machine, a

frame, a drive shaft, a. table slidably mountv ed in said frame and having a transverse slot, a knife carried by said table, an oscilp lating member carried by said table and having a knife positioned to co-act with said first-mentioned knife, means for feeding the paper stock between said knives at constant speed, a gear rotatably mounted under said table,means for actuating said gear from said drive shaft, means for varying the speed of said gear, and a block pivotally carried by said gear at a point distanced from the centre thereof and slidably engaging the slot in said table.` o

7. In a paper stock cutting lnachine, a reciprocating table carrying a lower knife therewith, an oscillating member carried by said table and having an upper knife positioned to co-act with said lower knife, means for feeding the paper stock between said knives at constant speed, and means for bringing the upper knife in engagement with the' paperstock slightly before said table has completed the first half of its forward stroke.

frame, a drive shaft, a table slidably mounted in said frame and having a transverse slot, a knife carried by said ta le, an oscillatinof member carried by said table and having a knife positioned to co-act with said firstmentioned knife, means for feeding the paper stock between said knives at constant speed, a gear rotatably mounted under said table, means for actuating lsaid gear from said drive shaft, means for varying the speed of said gear, a block pivotally carried by said gear at a point distanced from the centre thereof and slidably engaging the slot in said table, and means for varying the distance between said block and the centre of said gear automatically with the varying of the speed of said gear.

n a paper stock cutting machine, 'a frame, a drive shaft, a table slidably mounted in said frame and having a transverse slot, a knife carried by said table, an oscillating member carried by said table and having a knife positioned to co-act with said first-mentioned knife, means for feeding the paper stock between said knives at constant speed, a gear rotatably mounted under said table, means for actuating said gear from said drive shaft, means for varying the speed of said gear, a spindle rotatably and nonslidably mounted upon said gear, a block slidably mounted in theaxis of said spindle and threadedto engage one end thereof, a

second block sliding in the slot in' said tablel said tween said knives at constant speed, and a cam mechanism adapted to swing said member downwardly and upwardly on the forward stroke of said table.

11. In a paperv stock cutting machine, a frame, a table carrying a knife therewith, a frame pivotall carried adjacent] of the rear end of sai table and having a nife positioned to co-act with said first-mentioned knife, a track in said frame, a pair of levers pivoting adjacently of the front end of said table and having each a roller riding in said track, a link pivotally connected between said frame and said levers, and cams positioned in the path`of said rollers and adapted to swing said levers downwardly and upwardly on the forward stroke of said table.

Signed at the city of Toronto, this I28th day of December, 1926.

CHARLES EVERETT COLGROVE. 

